Biochar application enhances soil water storage in wet periods but intensifies drought conditions during dry periods in red soils - Yuanhang Fei; Zhipeng Liu; Jun Yi; Dongli She; Weiwen Qiu; Lan Jiang; Muxing Liu; Shenglong Li; Hanjiang Nie; Qi Li; Xin Ni; Hailin Zhang (Soil and Tillage Research, 2026)